1.非选择题- (共2题)

(1)甲细胞处于 分裂的 后 期,发生在图丙中的 阶段.
(2)乙细胞的名称为 ,其中①和②是一对 ,基因B与b的分离发生在图丙中的 阶段.
(3)若图乙细胞在进行减数第一次分裂时,③和④没有分离,减数第二次分裂正确,则最终形成的4个子细胞的基因型为 .
(1)有丝 后 bc
(2)初级精母细胞 同源染色体 ef
(3)AaB、AaB、b、b或Aab、Aab、B、B
表一:
基因型 饲喂条件 | AA | Aa | aa |
室温(20℃) | 正常翅 | 正常翅 | 残翅 |
低温(0℃) | 残翅 | 残翅 | 残翅 |
表二:
组别 | 雌性亲本 | 雄性亲本 | 子代饲喂条件 | 子代表现及数量 |
Ⅰ | ①残翅 | ②残翅 | 低温(0℃) | 全部残翅 |
Ⅱ | ③正常翅 | ④残翅 | 室温(20℃) | 正常翅91 残翅89 |
Ⅲ | ⑤残翅 | ⑥正常翅 | 室温(20℃) | 正常翅152 残翅49 |
注:雄性亲本均在室温(20℃)条件下饲喂
(1)亲代雌果蝇中___(填表二中序号)一定是在低温(0℃)的条件下饲养的;亲代果蝇中③的基因型一定是____.
(2)果蝇翅型的遗传说明了生物性状是_____共同调控的.
(3)亲代①的基因型可能是_____,为确定其基因型,某生物兴趣小组设计了实验思路,首先将第Ⅰ组的子代进行随机自由交配得F2,然后把F2放在(20℃)的条件下饲喂,观察统计F2表现型及比例.若F2正常翅与残翅的比例为____,则果蝇①的基因型为Aa.还可以设计实验思路为:用亲代①与亲本②杂交,然后把后代放在_____的条件下饲喂,观察并统计后代表现型及比例.
(4)若第Ⅱ组的亲本③与亲本④杂交,子代在室温(20℃)的条件下饲喂,子代只有两只果蝇成活,则子代果蝇中出现残翅果蝇的概率是___.
2.单选题- (共5题)

A.CD段含有4个染色体组,12个DNA分子 |
B.FG段可发生基因重组 |
C.若染色体②上有基因B,⑤的相同位点上有基因b,则其原因是在AB段发生了基因突变 |
D.右图中细胞是次级精母细胞,处于曲线图的HI段 |

A. 因为细胞中有中心体⑨,所以可以断定该细胞为动物细胞
B. ④是一个染色体,包含两个染色单体①、③,两个染色单体由一个着丝点②相连
C. 细胞中有两对同源染色体,即④和⑦为一对同源染色体,⑤和⑥为另一对同源染色体
D. 在后期时,移向同一极的染色体均为非同源染色体
A.生物的性状是由遗传因子决定的,生物体细胞中遗传因子成对存在 |
B.由F2出现了3:1推测生物体产生配子时,成对遗传因子彼此分离 |
C.若F1产生配子时成对遗传因子分离,则测交后代会出现两种性状比例接近1:1 |
D.若F1产生配子时成对遗传因子分离,则F2中三种基因型个体比例接近1:2:1 |
A.玉米种子萌发长成新植株 |
B.小鼠骨髓造血干细胞形成各种血细胞 |
C.小麦花粉经离体培养发育成单倍体植株 |
D.胡萝卜根韧皮部细胞经组织培养发育成新植株 |
3.选择题- (共3题)
Do you remember the last time you read a book, or a magazine? Is checking e-mails or updating microblog your daily reading habit? If you're one of those who don't make a habit of reading regularly, you might be really out.{#blank#}1{#/blank#}
Stress Reduction
No matter how much pressure you have at work, in your personal relationships, or other issues in daily life, it all just slips away when you lose yourself in a great story.{#blank#}2{#/blank#}
Knowledge
Everything you read fills your head with new information, and you never know when it might come into use.{#blank#}3{#/blank#}Besides, you might lose everything else—your job, your money, even your health, but knowledge can never be taken from you.
Vocabulary Expansion
{#blank#}4{#/blank#} As a result, this will gradually enlarge your everyday vocabulary. Then you might become more knowledgeable and well-spoken, which can increase your self confidence and even help you get promotions more quickly.
Better Writing Skills
Exposure to well-written work has a great effect on your own writing. In other words, writing styles of other authors will influence your own work.{#blank#}5{#/blank#}
Now that reading has so many benefits, step away from your computer and go hunting for something new to read!
A. Here are some benefits of reading.
B. Here are some suggestions for your health.
C. The more you read, the more words you gain exposure to.
D. This goes hand-in-hand with the expansion of your vocabulary.
E. A well-written novel can bring you pleasure, and allow you to relax.
F. The more knowledge you have, the better-equipped you are for your life.
G. That is why beginners always learn how to write by reading the works of others.
“白龙马,蹄朝西,驼着唐三藏跟着仨徒弟,西天取经真是不容易……”,歌曲中的唐三藏(玄奘)到达西天(天竺)后,所写的哪一本书成为研究中亚、印度半岛以及我国新疆地区历史和佛学的重要典籍( )
“白龙马,蹄朝西,驼着唐三藏跟着仨徒弟,西天取经真是不容易……”,歌曲中的唐三藏(玄奘)到达西天(天竺)后,所写的哪一本书成为研究中亚、印度半岛以及我国新疆地区历史和佛学的重要典籍( )
4.多选题- (共1题)
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【1】题量占比
非选择题:(2道)
单选题:(5道)
选择题:(3道)
多选题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:5
7星难题:0
8星难题:2
9星难题:1